[Weather] conversion help

[Matthew Smith]

Quoth Byron Lichtenwalner at 11/17/06 10:08...

...
>> Thus, going from a switch contact setup to a silicon-based one would
>> require an additional analogue stage before we start feeding into the
>> 1-Wire devices.  I haven't yet given this that much thought, but that
>> analogue stage may be as simple as a Schmidt trigger.
...
> And don't forget the power requirements!

...which would be +5V.  Although I haven't converted my station yet, I'm
going to feed +12 from a trickle-charged gel cell (we have unreliable
power) to the station and rain gauge.  Don't believe in putting to much
demand on the parasite power and am not happy with feeding a +5V supply
down the line as it sure won't be +5V by the time it gets to the other
end...

Thanks for throwing that one in, BD, because I really wouldn't want to
put any more burden on a parasite-powered installation.  I've always
thought it a wonder that mine works as well as it does.  (Big star
network, run to weather station about 25m.)

Cheers

M

-- 
Matthew Smith
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